cellular: Force modem to register with EVDO when using EVDO technology.

BUG=chromium-os:36951
TEST=cellular_Smoke, cellular_ModemControl (--technology=EVDO)

Change-Id: Id23bd9b9cae0a347196e31937e9fc0d9bfa9124b
Reviewed-on: https://gerrit.chromium.org/gerrit/39328
Reviewed-by: Arman Uguray <armansito@chromium.org>
Commit-Ready: Thieu Le <thieule@chromium.org>
Tested-by: Thieu Le <thieule@chromium.org>
2 files changed